110v AC to ±40v 4amp cheap and simple, transformerless

[jasonmbeamer]

Searching for ideas and know how on a simple cheap PS. Im tired of tranformers due to lack of, cost, and weight. I would like to start using somthing more high tech and hopefully cheaper.

110v in, ±40v unregulated out. I have been looking at capacitor voltage dividers. They seem simple enough to me. Any thought out there to steer me in the right direction would be apriciated.......

 

[RCinFLA]

Define unregulated?

There are also issues of isolation to AC mains.

Suggest you buy a switching power supply.

 

[Boncuk]

If you have enough room you might try using capacitors for 40V at 4A - 160W!

It is certainly possible to build a power supply using caps, but you should be prepared to sacrifice one room of the house to accomodate the power supply.

 

[Grillespi]

SWITCHING POWER SUPPLY ATX Come realizzare un SPS da laboratorio. How to Convert a Computer ATX Power Supply to a Laboratory Power Supply Da 1,0V a 15V e da 0,15A a 15A (20A) by Roberto Chirio

This is interesting.
But it comes only to 30V.
How many Amps do you need?